I had to buy a minidp to dp cable as my HDMI is used for the TV. The socket is there on the Vive but not the cable. You need to mount the 2 Base stations, I have one screwed to the wall and one on a mini tripod on top of a cabinet. You need power near each Base station and for the link box. I use my USB multi charger for the handsets instead of the supplied ones. You can watch movies in the steam theatre but I purchased virtual desktop which allows me to resize, curve and move my screen around to play standard games and movies.
They are set in 2 diagonal corners of the room. Luckily I had sockets in both corners of mine. You can always run extensions I suppose.
Year, I would wait now if I were you. Should be able to try out both in more stores in the next few months. Since you are waiting for your new beast of a PC anyway it makes more sense. I am very much OCD regarding cables with my speaker cables under the floor and all my PC to sound and TV connections hidden behind my TV unit. I do use some D-Line trunking which is very nice and simple around skirting boards to hide some of the other cables.